How about when the kid was in preschool letting him watch AquaTeenHungerForce? Most responses from other adults to hearing him say ‘Gentlemen Behold!’ was either ‘Awesome!’ or ‘You are raising that kid right’

Getting him to learn the lyrics to Trogdor? I can still go ‘and the Trogdor burns in the…’ and he will go ‘niiiiiiiiiiiiiiiiiiiiiiight’